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# msgrcv _____________________________________________________
# long sys_msgrcv (int msqid,
# struct msgbuf __user *msgp,
# size_t msgsz,
# long msgtyp,
# int msgflg)
#
@define _SYSCALL_MSGRCV_NAME
%(
name = "msgrcv"
%)
@define _SYSCALL_MSGRCV_ARGSTR
%(
argstr = sprintf("%d, %p, %u, %d, %s", msqid, msgp_uaddr, msgsz,
msgtyp, msgflg_str)
%)
@define _SYSCALL_MSGRCV_REGARGS
%(
msqid = int_arg(1)
msgp_uaddr = pointer_arg(2)
msgsz = ulong_arg(3)
msgtyp = long_arg(4)
msgflg = int_arg(5)
msgflg_str = _stp_msgflg_str(msgflg)
%)
@define _SYSCALL_MSGRCV_REGARGS_STORE
%(
if (@probewrite(msqid))
set_int_arg(1, msqid)
if (@probewrite(msgp_uaddr))
set_pointer_arg(2, msgp_uaddr)
if (@probewrite(msgsz))
set_ulong_arg(3, msgsz)
if (@probewrite(msgtyp))
set_long_arg(4, msgtyp)
if (@probewrite(msgflg))
set_int_arg(5, msgflg)
%)
probe syscall.msgrcv = dw_syscall.msgrcv !, nd_syscall.msgrcv ? {}
probe syscall.msgrcv.return = dw_syscall.msgrcv.return !,
nd_syscall.msgrcv.return ? {}
# dw_msgrcv _____________________________________________________
probe dw_syscall.msgrcv = kernel.function("sys_msgrcv").call ?
{
@__syscall_gate_compat_simple
@_SYSCALL_MSGRCV_NAME
msqid = __int32($msqid)
msgp_uaddr = $msgp
msgsz = __ulong($msgsz)
msgtyp = $msgtyp
msgflg = __int32($msgflg)
msgflg_str = _stp_msgflg_str(__int32($msgflg))
@_SYSCALL_MSGRCV_ARGSTR
}
probe dw_syscall.msgrcv.return = kernel.function("sys_msgrcv").return ?
{
@__syscall_gate_compat_simple
@_SYSCALL_MSGRCV_NAME
@SYSC_RETVALSTR($return)
}
# nd_msgrcv _____________________________________________________
probe nd_syscall.msgrcv = nd1_syscall.msgrcv!, nd2_syscall.msgrcv!, tp_syscall.msgrcv
{ }
probe nd1_syscall.msgrcv = kprobe.function("sys_msgrcv") ?
{
@__syscall_gate_compat_simple
@_SYSCALL_MSGRCV_NAME
asmlinkage()
@_SYSCALL_MSGRCV_REGARGS
@_SYSCALL_MSGRCV_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.msgrcv = kprobe.function(@arch_syscall_prefix "sys_msgrcv") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_MSGRCV_NAME
@_SYSCALL_MSGRCV_REGARGS
@_SYSCALL_MSGRCV_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_MSGRCV_REGARGS_STORE %)
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.msgrcv = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_gate(@const("__NR_msgrcv"))
@_SYSCALL_MSGRCV_NAME
@_SYSCALL_MSGRCV_REGARGS
@_SYSCALL_MSGRCV_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_MSGRCV_REGARGS_STORE %)
}
probe nd_syscall.msgrcv.return = nd1_syscall.msgrcv.return!, nd2_syscall.msgrcv.return!, tp_syscall.msgrcv.return
{ }
probe nd1_syscall.msgrcv.return = kprobe.function("sys_msgrcv").return ?
{
@__syscall_gate_compat_simple
@_SYSCALL_MSGRCV_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.msgrcv.return = kprobe.function(@arch_syscall_prefix "sys_msgrcv").return ?
{
@_SYSCALL_MSGRCV_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.msgrcv.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_gate(@const("__NR_msgrcv"))
@_SYSCALL_MSGRCV_NAME
@SYSC_RETVALSTR($ret)
}
# compat_sys_msgrcv ________________________________________
#
# long compat_sys_msgrcv(int first, int second, int msgtyp, int third,
# int version, void __user *uptr)
# COMPAT_SYSCALL_DEFINE5(msgrcv, int, msqid, compat_uptr_t, msgp,
# compat_ssize_t, msgsz, long, msgtyp, int, msgflg)
# ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC
# COMPAT_SYSCALL_DEFINE6(ipc, u32, call, int, first, int, second,
# u32, third, compat_uptr_t, ptr, u32, fifth)
# endif
#
probe syscall.compat_sys_msgrcv = dw_syscall.compat_sys_msgrcv !,
nd_syscall.compat_sys_msgrcv ? {}
probe syscall.compat_sys_msgrcv.return = dw_syscall.compat_sys_msgrcv.return !,
nd_syscall.compat_sys_msgrcv.return ? {}
# dw_compat_sys_msgrcv _____________________________________________________
probe dw_syscall.compat_sys_msgrcv = __syscall.compat_msgrcv ?,
__syscall.compat_ipc.msgrcv ?
{
@_SYSCALL_MSGRCV_NAME
msgflg_str = _stp_msgflg_str(msgflg)
@_SYSCALL_MSGRCV_ARGSTR
}
probe __syscall.compat_msgrcv = kernel.function("compat_sys_msgrcv").call ?
{
@__compat_syscall_gate_negative(@const("__NR_compat_ipc"))
msqid = __int32(@choose_defined($msqid, $first))
if (@defined($version)) {
msgp_uaddr = _stp_compat_msgrcv_msgbuf($uptr, $version)
msgtyp = _stp_compat_msgrcv_msgtyp($uptr, $version, $msgtyp)
}
else {
msgp_uaddr = $msgp
msgtyp = __int32($msgtyp)
}
msgsz = __uint32(@choose_defined($msgsz, $second))
msgflg = __int32(@choose_defined($msgflg, $third))
}
probe __syscall.compat_ipc.msgrcv = kernel.function("compat_sys_ipc").call ?,
kernel.function("sys32_ipc").call ?
{
if (($call & 0xffff) != @const("MSGRCV")) next;
msqid = __int32($first)
msgsz = __uint32($second)
msgflg = __int32($third)
# __version isn't quite correct (it should be shifted down 16
# bits), but all we really need is zero/non-zero.
__version = $call & 0xffff0000
msgp_uaddr = _stp_compat_msgrcv_msgbuf($ptr, __version)
msgtyp = _stp_compat_msgrcv_msgtyp($ptr, __version,
@choose_defined($fifth, 0))
}
probe dw_syscall.compat_sys_msgrcv.return =
__syscall.compat_sys_msgrcv.return ?,
__syscall.compat_ipc.msgrcv.return ?
{
@_SYSCALL_MSGRCV_NAME
@SYSC_RETVALSTR($return)
}
probe __syscall.compat_sys_msgrcv.return =
kernel.function("compat_sys_msgrcv").return ?
{
@__compat_syscall_gate_negative(@const("__NR_compat_ipc"))
}
probe __syscall.compat_ipc.msgrcv.return =
kernel.function("compat_sys_ipc").return ?,
kernel.function("sys32_ipc").return ?
{
if ((@entry($call) & 0xffff) != @const("MSGRCV")) next;
}
# nd_compat_sys_msgrcv _____________________________________________________
probe nd_syscall.compat_sys_msgrcv = nd1_syscall.compat_sys_msgrcv!, nd2_syscall.compat_sys_msgrcv!, tp_syscall.compat_sys_msgrcv
{ }
probe nd1_syscall.compat_sys_msgrcv = __nd1_syscall.compat_msgrcv ?,
__nd1_syscall.compat_ipc.msgrcv ?
{
@_SYSCALL_MSGRCV_NAME
msgflg_str = _stp_msgflg_str(msgflg)
@_SYSCALL_MSGRCV_ARGSTR
}
probe __nd1_syscall.compat_msgrcv = kprobe.function("compat_sys_msgrcv") ?
{
@__compat_syscall_gate_negative(@const("__NR_compat_ipc"))
asmlinkage()
msqid = int_arg(1)
%(kernel_v >= "3.15.0" %?
msgp_uaddr = pointer_arg(2)
msgsz = uint_arg(3)
msgtyp = long_arg(4)
msgflg = int_arg(5)
%:
__version = int_arg(5)
__uptr = pointer_arg(6)
msgp_uaddr = _stp_compat_msgrcv_msgbuf(__uptr, __version)
msgtyp = _stp_compat_msgrcv_msgtyp(__uptr, __version, int_arg(3))
msgsz = uint_arg(2)
msgflg = int_arg(4)
%)
}
// What is going on here? compat_sys_ipc() takes 6 arguments and
// sys32_ipc() takes 5. That last extra argument is passed to
// _stp_compat_msgrcv_msgtype(). So, we'll need to break this down
// into 2 subprobes. To make sure we keep things in sync, we'll put the
// common code in a macro.
@define __ND_SYSCALL_COMPAT_IPC_MSGRCV_CODE
%(
asmlinkage()
if ((uint_arg(1) & 0xffff) != @const("MSGRCV")) next;
msqid = int_arg(2)
msgsz = uint_arg(3)
msgflg = int_arg(4)
# __version isn't quite correct (it should be shifted down 16
# bits), but all we really need is zero/non-zero.
__version = uint_arg(1) & 0xffff0000
__uptr = pointer_arg(5)
msgp_uaddr = _stp_compat_msgrcv_msgbuf(__uptr, __version)
%)
@define _SYSCALL_COMPAT_IPC_MSGRCV_REGARGS_STORE
%(
if (@probewrite(__version))
set_uint_arg(1, __version)
if (@probewrite(msqid))
set_int_arg(2, msqid)
if (@probewrite(msgsz))
set_uint_arg(3, msgsz)
if (@probewrite(msgflg))
set_int_arg(4, msgflg)
if (@probewrite(__uptr))
set_ponter_arg(5, __uptr)
%)
probe __nd1_syscall.compat_ipc.msgrcv = __nd1_syscall.compat_sys_ipc.msgrcv ?,
__nd1_syscall.sys32_ipc.msgrcv ?
{
}
probe __nd1_syscall.compat_sys_ipc.msgrcv = kprobe.function("compat_sys_ipc") ?
{
@__ND_SYSCALL_COMPAT_IPC_MSGRCV_CODE
msgtyp = _stp_compat_msgrcv_msgtyp(__uptr, __version, int_arg(6))
}
probe __nd1_syscall.sys32_ipc.msgrcv = kprobe.function("sys32_ipc") ?
{
@__ND_SYSCALL_COMPAT_IPC_MSGRCV_CODE
msgtyp = _stp_compat_msgrcv_msgtyp(__uptr, __version, 0)
}
/* kernel 4.17+ */
probe nd2_syscall.compat_sys_msgrcv = kprobe.function(@arch_syscall_prefix "compat_sys_ipc") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_MSGRCV_NAME
@__ND_SYSCALL_COMPAT_IPC_MSGRCV_CODE
msgtyp = _stp_compat_msgrcv_msgtyp(__uptr, __version, int_arg(6))
msgflg_str = _stp_msgflg_str(msgflg)
@_SYSCALL_MSGRCV_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_COMPAT_IPC_MSGRCV_REGARGS_STORE %)
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.compat_sys_msgrcv = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__compat_syscall_gate(@const("__NR_compat_ipc"))
if ((uint_arg(1) & 0xffff) != @const("MSGRCV")) next;
@_SYSCALL_MSGRCV_NAME
@__ND_SYSCALL_COMPAT_IPC_MSGRCV_CODE
msgtyp = _stp_compat_msgrcv_msgtyp(__uptr, __version, int_arg(6))
msgflg_str = _stp_msgflg_str(msgflg)
@_SYSCALL_MSGRCV_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_COMPAT_IPC_MSGRCV_REGARGS_STORE %)
}
probe nd_syscall.compat_sys_msgrcv.return = nd1_syscall.compat_sys_msgrcv.return!, nd2_syscall.compat_sys_msgrcv.return!, tp_syscall.compat_sys_msgrcv.return
{ }
probe nd1_syscall.compat_sys_msgrcv.return =
__nd1_syscall.compat_sys_msgrcv.return ?,
__nd1_syscall.compat_ipc.msgrcv.return ?
{
@_SYSCALL_MSGRCV_NAME
@SYSC_RETVALSTR(returnval())
}
probe __nd1_syscall.compat_sys_msgrcv.return =
kprobe.function("compat_sys_msgrcv").return ?
{
@__compat_syscall_gate_negative(@const("__NR_compat_ipc"))
}
probe __nd1_syscall.compat_ipc.msgrcv.return =
kprobe.function("compat_sys_ipc").return ?,
kprobe.function("sys32_ipc").return ?
{
if ((@entry(__asmlinkage_int_arg(1)) & 0xffff) != @const("MSGRCV")) next;
}
/* kernel 4.17+ */
probe nd2_syscall.compat_sys_msgrcv.return =
kprobe.function(@arch_syscall_prefix "compat_sys_ipc").return ?
{
__set_syscall_pt_regs(@entry(pointer_arg(1)))
if ((uint_arg(1) & 0xffff) != @const("MSGRCV")) next;
@_SYSCALL_MSGRCV_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.compat_sys_msgrcv.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__compat_syscall_gate(@const("__NR_compat_ipc"))
if ((uint_arg(1) & 0xffff) != @const("MSGRCV")) next;
@_SYSCALL_MSGRCV_NAME
@SYSC_RETVALSTR($ret)
}